#ifndef __LOCKER_H__
#define __LOCKER_H__

#include <pthread.h>
#include <exception>
#include <semaphore.h>

//线程同步机制封装类
class Locker {
public:
    Locker() {
        if(pthread_mutex_init(&m_mutex, NULL) != 0) {
            throw std::exception();
        }
    }

    ~Locker() {
        pthread_mutex_destroy(&m_mutex);
    }

    bool lock() {
        return pthread_mutex_lock(&m_mutex) == 0;
    }

    bool unlock() {
        return pthread_mutex_unlock(&m_mutex) == 0;
    }

    pthread_mutex_t* get() {
        return &m_mutex;
    }

private:
    pthread_mutex_t m_mutex;
};

//条件变量类
class Cond {
public:
    Cond() {
        if(pthread_cond_init(&m_cond, NULL) != 0) {
            throw std::exception();
        }
    }

    ~Cond() {
        pthread_cond_destroy(&m_cond);
    }

    bool wait(pthread_mutex_t* mutex) {
        return pthread_cond_wait(&m_cond, mutex) == 0;
    }
    bool timedwait(pthread_mutex_t* mutex, timespec timespec) {
        return pthread_cond_timedwait(&m_cond, mutex, &timespec) == 0;
    }

    bool signal() {
        return pthread_cond_signal(&m_cond) == 0;
    }

    bool broadcast() {
        return pthread_cond_broadcast(&m_cond) == 0;
    }

private:
    pthread_cond_t m_cond;
};

//信号量类
class Sem {
public:
    Sem(){
        if(sem_init(&m_sem, 0, 0) != 0) {
            throw std::exception();
        }
    }
    Sem(int num){
        if(sem_init(&m_sem, 0, num) != 0) {
            throw std::exception();
        }
    }
    ~Sem() {
        sem_destroy(&m_sem);
    }

    bool wait() {
        return sem_wait(&m_sem) == 0;
    }
    bool post() {
        return sem_post(&m_sem) == 0;
    }
private:
    sem_t m_sem;
};

#endif